CN109596436A - The accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage - Google Patents
The accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage Download PDFInfo
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- CN109596436A CN109596436A CN201910031935.9A CN201910031935A CN109596436A CN 109596436 A CN109596436 A CN 109596436A CN 201910031935 A CN201910031935 A CN 201910031935A CN 109596436 A CN109596436 A CN 109596436A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/003—Generation of the force
- G01N2203/0042—Pneumatic or hydraulic means
- G01N2203/0048—Hydraulic means
Abstract
The invention discloses a kind of accurate driving methods of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage, and implementation method, the accurate Driving Scheme calculation method of static(al), the accurate driving system structure design method of static(al), the accurate drive system hydraulic control function design method of static(al), the load of the accurate drive system of static(al) of the accurate loading simulator of static(al) including being applied to the test of large-tonnage safe type material mechanical strength lose the method for controlling security under carrying suddenly.Method of the invention meets the needs of static(al) precision load test controls high-precision, flexibility, security control type to pressure, and this method can promote the use of other static force loading device developments.
Description
Technical field
The present invention relates to technical field of hydraulic, in particular to a kind of accurate loading simulation dress of the safety-type static(al) of large-tonnage
The accurate driving method of the static(al) set.
Background technique
The strength character of material is material as one of most important index of mechanical part, Large-Scale Equipment, military project composite wood
Expect, the strength character of energetic material is related to the reliability and security of the safety of Large-Scale Equipment, weaponry.
Anisotropic composite material in the long-life in use, due to basic load, high/low temperature temperature loading, fatigue load,
Under the action of the various load such as creep loading, strength character changes.Strength character degeneration has become material in the long-life
One of problem is easiest in use.
Explosive material is seriously affected fried as a kind of anisotropic composite material by its strength reduction under basic load
The mechanical strength performance of drug material.For the life appraisal for carrying out explosive material, the life model of explosive material is established, need to be studied fried
The basic load of drug material and the relationship in intensity service life, urgent need establish a set of large-tonnage suitable for explosive material, basic load
Accurate controllable type, the accurate loading device of safety-type static(al).
Existing static loading machine only meets the controllable load function of precision of low tonnage (10T or less) and in low load area
Domain there are pressure precision controlling dead error, be unable to satisfy the load precision control function in full load domain, be unable to satisfy large-tonnage, static(al)
Load precision controls load demand.In addition, the security control performance of existing static loading machine is lower, it is unable to satisfy explosive material
Static loading simulation needed for security control performance.
For the static strength test and evaluation demand for meeting explosive material, it is badly in need of one large-tonnage of invention, basic load essence
The basic load loading device of close control type, security control type.It is the quiet of the accurate loading simulator of static(al) that static(al), which accurately drives,
Power source, linear properties and controllability are directly related to the accuracy of the accurate loading simulator of static(al), linear, flexibility,
That there are controllable types is poor for the existing hydraulic-driven technology announced, control precision is low, carries that defencive function, there are big low pressure without losing
The disadvantages of dead zone, need to invent a kind of accurate driving method of static(al).
Summary of the invention
It is insufficient the purpose of the present invention is overcoming in above-mentioned background technique, a kind of safety-type static(al) of large-tonnage is provided and is accurately loaded
The accurate driving method of the static(al) of simulator, it is therefore an objective to for the accurate loading simulator of static(al) provide it is accurate, can accurate control, nothing
Dead zone, flexibility static(al) source, meet the accurate running uplink of loading device loading component idle running of static(al) and downward movement control
The requirement of load control and Bit andits control to static(al) drive system during system, loading and unloading.
In order to reach above-mentioned technical effect, the present invention takes following technical scheme:
It is specifically included in the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of the large-tonnage of the application
The accurate drive system of static(al) of the accurate loading simulator of static(al) applied to the test of large-tonnage safe type material mechanical strength
Implementation method is accurately driven applied to the static(al) of the accurate loading simulator of static(al) of large-tonnage safe type material mechanical strength test
Dynamic System Design Calculational Methods, the accurate loading simulator of static(al) applied to large-tonnage safe type material mechanical strength test
The accurate driving system structure design method of static(al), the static(al) tested applied to large-tonnage safe type material mechanical strength accurately load
The accurate drive system hydraulic control function design method of the static(al) of simulator is applied to large-tonnage safe type material mechanical strength
The load of the accurate loading simulator of the static(al) of test loses the method for controlling security under carrying suddenly.
Specifically, being applied to the static(al) of the accurate loading simulator of static(al) of large-tonnage safe type material mechanical strength test
The implementation method of accurate drive system, specifically includes:
Firstly, in this method, the accurate drive system of static(al) is preferred in view of high-accuracy, safety-type, long-time service etc. requires
It is realized using hydraulic-driven method, driving static(al) accurate can be controlled by design hydraulic drive control system speed and generated, passed through
Hydraulic cylinder realizes driving static(al) linear convergent rate to being modeled loading component；
Meanwhile the fluid power system of this method uses automatically controlled servo valve drive control type hydraulic system, is driven by motor
Hydraulic pump provides hydraulic oil source, by hydraulic directio control valve, hydraulic proportional flow valve control liquid corresponding with hydraulic proportional overflow valve
Press direction, flow and the pressure of Medium Oil；
Finally, by accurate cylinder-shaped hydraulic cylinder by direction, flow and the controllable hydraulic energy of pressure in this method
It is converted into linear driving mechanical energy output, realizes the uplink and downlink, loading and unloading function of load formed punch.
Specifically, the accurate loading simulation dress of the static(al) for being applied to the test of large-tonnage safe type material mechanical strength of the invention
The accurate Driving Scheme calculation method of the static(al) set, specifically includes:
Firstly, the maximum working pressure (MWP) for designing hydraulic system in this method is 20Mpa, to meet hydraulic system versatility
It is required that；
Secondly, specifically according to the maximum static design requirement of the accurate loading simulator of static(al) in this method, i.e., it is maximum quiet
Power is equal to the relationship of design maximum pressure and the effective internal diameter area of oil cylinder, and effective cylinder diameter: D is calculatedeffective, calculation formula
Such as formula:
Wherein: PmaxIndicate maximum pressure, unit: Pa；
FmaxIndicate maximum pressure, unit: N；
SeffectiveIndicate the effective internal diameter of oil cylinder, unit: m2；
DeffectiveIndicate the effective internal diameter of oil cylinder, unit: m.
Meanwhile specifically according to the assembling work height H of static loading simulated experiment in this method1With explosive material when load
Height H0Determine the stroke H of hydraulic cylinder2, calculation formula are as follows: H2=H1-H0；
Calculation method in this method about hydraulic oil container volume are as follows: according to hydraulic cylinder volume VcyIt is filled with hydraulic oil pipeline
Medium oil volume V after fullpipe, according to 4/5ths original for being not less than total volume full of hydraulic station fuel tank volume after Medium Oil
Then, hydraulic station fuel tank volume V is calculatedtank, calculation formula are as follows:
Vtank=5 (Vcy+Vpipe)
Wherein: VcyIndicate hydraulic cylinder volume, unit are as follows: m3；
VpipeIndicate in pipeline medium oil volume, unit are as follows: m under normal pressure3；
VtankIndicate hydraulic station fuel tank volume, unit are as follows: m3；
Hydraulic-driven pumping source design method is further related in this method, specifically:
According to the idle running rate request of uplink and downlink, the hydraulic medium oil output that pumping source is driven in lost motion is calculated
Flow νZeroLoad, the medium oil volume V of oil cylinder is filled it up with according to calculation methodVatFullWith the time used
Then, require the hydraulic medium for designing the dynamic middle driving pumping source of carrying oily according to the load rate of loading and unloading
Output flow νLoad, calculation method is to be carried out calculating according to liquid compression formula being loaded into peak load FMaxJie of required injection
Matter oil volume Δ VInject, the shortest time t according to needed for being loaded into peak loadLoadMaxMaximum Medium Oil injection is calculated
Speed
Preferably, working as ν in view of proportional flow control valve work dead zone cut-off characteristicsZeroLoad≥10·νLoadWhen, generally need
Idle running is respectively completed using the hydraulic pump of two different flows and has the hydraulic-driven function of load；
Specifically, load predominantly overcomes liquid inertia and frictional force since idle running pump only completes uplink and downlink movement,
It is general to select outlet pressure in 2Mpa low-pressure hydraulic pump below, meanwhile, the hydraulic system according to needed for loading force loads work
Pressure, the maximum pressure of design load pump should be not less than 25MPa in this method；
Hydraulic-driven pump motor design method in this method specifically:
It is general to select threephase asynchronous machine driving, the power P o of motorMotorAccording to pump discharge pressure PPumpWith flow νPump
It calculates:
Proportional pressure control valve circuit design method in this method specifically: hydraulic proportional overflow is selected according to maximum working pressure (MWP)
Valve, and the lockable maximum pressure firmly of hydraulic proportional overflow valve should be greater than the maximum working pressure (MWP) of hydraulic system；
Proportional flow control valve circuit design method specifically: hydraulic according to the linearity and traffic requirement of accurate drive system
The maximum stream flow of proportional flow control valve should be with flow matches needed for maximum load speed.
Specifically, the accurate loading simulation dress of the static(al) for being applied to the test of large-tonnage safe type material mechanical strength of the invention
The accurate driving system structure design method of the static(al) set, specifically includes:
Firstly, the accurate drive system of the static(al) designed in this method composition include: hydraulic oil container, hydraulic valve control block,
Motor and hydraulic pump, hydraulic directio control valve, hydraulic circuit flow control valve, hydraulic circuit proportional pressure control valve, hydraulic cylinder, liquid
Pressuring oil pipe, hydraulic oil meter, hydraulic cylinder pressure sensor, cylinder displacement sensor etc.；
Wherein, hydraulic oil container provides medium oil sources for hydraulic system；Hydraulic electric motor provides with hydraulic pump for hydraulic system dynamic
Pressure medium oil pump is entered hydraulic valve control block by power；Various hydraulic valves (hydraulic directio control valve, hydraulic circuit flow control valve,
Hydraulic circuit proportional pressure control valve) with hydraulic valve control block realize that the direction of hydraulic oil, pressure, flow and pressure and other parameters control；
Hydraulic cylinder is used to export machine power and load to accurate load driver device；Hydraulic oil pipe realizes hydraulic station and hydraulic cylinder
Medium Oil piping connection；Hydraulic oil meter is used to indicate the output pressure of hydraulic pump；Hydrostatic sensor is for measuring hydraulic cylinder
Medium pressure；Proportional pressure control valve realizes the control of hydraulic cylinder pressure by control aperture；Proportional flow control valve passes through control flow
Realize the control of hydraulic cylinder pressure；Cylinder displacement sensor is used to measure the absolute displacement of oil cylinder formed punch；
Specifically, the connection installation relation of above-mentioned each component part are as follows: hydraulic oil container is the main body of hydraulic system, hydraulic valve
Control block, motor and hydraulic pump are mounted on hydraulic oil container；Hydraulic valve piece is mounted in hydraulic valve control block；Motor and hydraulic pump
Connection, hydraulic pump one end connects fuel tank, the other end connects hydraulic valve control block；Hydraulic oil meter is mounted on the outlet of hydraulic pump；Liquid
Pressure oil cylinder pressure transducer is mounted on the import of hydraulic cylinder；Cylinder displacement sensor is built in oil cylinder, kinematic link and oil
Cylinder formed punch is integrally mobile.
Meanwhile in the accurate drive system of static(al) designed in this method include two-way drive hydraulic motor circuit, respectively by
Motor and hydraulic pressure pump group are at responsible fast offset control function, is responsible for load control function all the way all the way；Two-way hydraulic-driven electricity
Machine circuit includes motor, hydraulic pump, hydraulic oil meter；Realize that hydraulic pump used in the electric motor loop of fast offset control function is
Low-lift pump realizes that hydraulic pump used in the electric motor loop of load control function is high-pressure pump；Specific requirement is low in the design method
The hydraulic output pressure of press pump is not higher than 1MPa, and the rate of discharge of low-lift pump requires to set according to the idle running velocity of displacement of oil cylinder formed punch
Meter, it may be assumed that
Flow=vlow·Seffective,
Wherein；vlowOil cylinder formed punch idle running speed when for low pressure pump operation, unit: m/s；
FlowLow pressure pump discharge when being run for oil cylinder formed punch idle running, unit: m3/s；
The highest hydraulic output pressure of high-pressure pump is not less than 20MPa, the rate of discharge of high-pressure pump according to oil cylinder formed punch load
Lotus controls rate request and the discharge characteristic of proportional flow control valve is combined to design, it may be assumed that
Fhigh=vhigh·Seffective,
Wherein；vhighOil cylinder formed punch idle running speed when for low pressure pump operation, unit: m/s；
FhighLow pressure pump discharge when being run for oil cylinder formed punch idle running, unit: m3/s；
Two hydraulic oil meters are respectively used to outlet pressure and the debugging for loading system, fault verification of monitoring hydraulic pump
With maintenance.
Specifically, above-mentioned hydraulic directio control valve is designed to include high-low pressure oil circuit selection switching valve, high-pressure oil passage
The functions such as on-off control valve, cylinder pipe on-off control valve, uplink and downlink oil passage change-over valve.
Above-mentioned hydraulic proportional flow valve (i.e. hydraulic circuit flow control valve) is designed to mainly realize load loading mode
Under the accurate control model of displacement, realize loading procedure in be displaced high-precision control；Wherein, the inlet and outlet of hydraulic proportional flow valve
Carrying oil pressure is designed as not less than 20MPa；The latus rectum characteristic of hydraulic proportional flow valve needs linear and low discharge dead zone；Hydraulic ratio
Example flow valve maximum diameter is designed according to Bit andits control maximum value in loading procedure.
Above-mentioned hydraulic proportional overflow valve (i.e. hydraulic circuit proportional pressure control valve) is designed to mainly realize load loading mode
Under the accurate control model of load, realize loading procedure in load high-precision control；Wherein, the disengaging of hydraulic proportional overflow valve valve
Mouthpiece carries oil pressure and is designed as not less than 20MPa；The turbulent behavior of hydraulic proportional overflow valve needs dull and low pressure dead zone；Hydraulic ratio
Example overflow valve maximum oil pressure relief is designed according to not less than 20MPa.
Specifically, the accurate loading simulation dress of the static(al) for being applied to the test of large-tonnage safe type material mechanical strength of the invention
The accurate drive system hydraulic control function design method of the static(al) set, specifically includes:
Firstly, hydraulic control function at least should include: hydraulic punching head downlink, uplink, loading and unloading；Hydraulic pump valve block root
It is designed according to hydraulic drawing and action schedule, it is hydraulic valve control block, motor, hydraulic pump, hydraulic oil meter, hydraulic directio control valve, hydraulic
Operated proportional flow control valve and hydraulic proportional overflow valve have collectively constituted hydraulic Medium Oil direction, Medium Oil pressure, medium oil stream
The control of amount；
The implementation method of the downlink working designed in this method are as follows: low pressure pump startup, low pressure pump-protecting valve, backhaul commutation are opened
It closes valve, downing switch valve, backhaul switch valve to close, remaining valve member is opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are not
Control is participated in, realizes and high-volume hydraulic oil is injected into oil cylinder top, oil cylinder downlink drives output mechanism downlink；
The implementation method of uplink work are as follows: low pressure pump startup, low pressure pump-protecting valve, downlink reversing switch valve, downing switch
Valve, backhaul switch valve are closed, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are not involved in control, are realized
High-volume hydraulic oil is injected into oil cylinder lower part, oil cylinder uplink drives output mechanism uplink, realizes backhaul function；
Load the implementation method of work are as follows: high pressure pump startup, unload compress switch, loaded switches and backhaul switching function it is hydraulic
Directional control valve is closed, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are according to high-precision wire linearity curve
Load control algolithm calculates proportional flow control valve aperture and proportional overflow valve opening in real time, realizes that controllable, on-load pressure can by flow
The small flow hydraulic oil controlled injects oil cylinder top, and oil cylinder hydraulic power rises, and realizes that driving output mechanism pressurizes to device is loaded；
The implementation method of unloaded operation are as follows: high-pressure pump, low-lift pump stop, and the hydraulic directional control valve of loaded switches function closes
It closes, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are according to high-precision wire linearity curve Unloading Control algorithm
Proportional flow control valve aperture and proportional overflow valve opening are calculated, realizes small flow hydraulic oil flow is controllable, that on-load pressure is controllable
It is discharged from oil cylinder top, the decline of oil cylinder hydraulic power realizes driving output mechanism to the discharge for being loaded device application；
Static state protects the implementation method for carrying work are as follows: high-pressure pump, low-lift pump stop, the control of release switching function hydraulic directio
Valve is closed, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve maintain load or unloading finish time
Proportional flow valve opening and proportional overflow valve opening it is constant, maintain oil cylinder inside hyperbaric environment, realize driving output mechanism
The load for being loaded device application is protected and is carried；
The implementation method of ftercompction work are as follows: high pressure pump startup, unload compress switch, loaded switches and the hydraulic side of backhaul switching function
It is closed to control valve, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are according to control flexible linear ftercompction
Algorithm calculates proportional flow control valve aperture and proportional overflow valve opening, realizes small flow liquid flow is controllable, that on-load pressure is controllable
Pressure oil injects oil cylinder top, and oil cylinder hydraulic power rises to goal pressure, realizes driving output mechanism to being loaded device ftercompction.
Specifically, the accurate loading simulation dress of the static(al) for being applied to the test of large-tonnage safe type material mechanical strength of the invention
The load set loses the method for controlling security under carrying suddenly, specifically includes load and loses the Security Design Methods under carrying suddenly and control behaviour
Make process:
Load loses the Security Design Methods under carrying suddenly are as follows: after load loses load, hydraulic system need to have self-closing lock function, liquid
Pressure lock can be latched hydraulic circuit, and high-pressure medium oil is latched and is ended；Control operating process includes: the height for cutting off loading oil circuit at once
Hydraulic coupling is discharged into level of security according to hydraulic coupling pressure relief method, according to setting speed by press pump motor.
Compared with prior art, the present invention have it is below the utility model has the advantages that
The present invention provides a kind of load driver systems applied to the accurate loading simulator of material static strength static(al) to set
Meter method meets the needs of static(al) precision load test controls high-precision, flexibility, security control type to pressure, and this method can
Promote the use of other static force loading device developments.
Detailed description of the invention
Fig. 1 is the accurate driving system structure schematic diagram of static(al) of the invention.
Specific embodiment
Below with reference to the embodiment of the present invention, the invention will be further elaborated.
Embodiment:
It is specifically included in the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of the large-tonnage of the application
The accurate drive system of static(al) of the accurate loading simulator of static(al) applied to the test of large-tonnage safe type material mechanical strength
Implementation method is accurately driven applied to the static(al) of the accurate loading simulator of static(al) of large-tonnage safe type material mechanical strength test
Dynamic System Design Calculational Methods, the accurate loading simulator of static(al) applied to large-tonnage safe type material mechanical strength test
The accurate driving system structure design method of static(al), the static(al) tested applied to large-tonnage safe type material mechanical strength accurately load
The accurate drive system hydraulic control function design method of the static(al) of simulator is applied to large-tonnage safe type material mechanical strength
The load of the accurate loading simulator of the static(al) of test loses the method for controlling security under carrying suddenly.
Specifically, being applied to the static(al) of the accurate loading simulator of static(al) of large-tonnage safe type material mechanical strength test
The implementation method of accurate drive system, specifically includes:
Firstly, in the present embodiment, the accurate drive system of static(al) is excellent in view of high-accuracy, safety-type, long-time service etc. requires
It selects and is realized using hydraulic-driven method, driving static(al) accurate can be controlled by design hydraulic drive control system speed and generated, led to
Crossing hydraulic cylinder realizes driving static(al) linear convergent rate to being modeled loading component；
Meanwhile the fluid power system of the present embodiment uses automatically controlled servo valve drive control type hydraulic system, is driven by motor
Hydrodynamic press pump provides hydraulic oil source, by hydraulic directio control valve, the control corresponding with hydraulic proportional overflow valve of hydraulic proportional flow valve
Direction, flow and the pressure of hydraulic medium oil.
Preferably, by accurate cylinder-shaped hydraulic cylinder that direction, flow and pressure is controllable in the present embodiment
Hydraulic energy transfer is that linear driving mechanical energy exports, and realizes the uplink and downlink, loading and unloading function of load formed punch.
Specifically, the accurate loading simulation of static(al) for being applied to the test of large-tonnage safe type material mechanical strength of the present embodiment
The accurate Driving Scheme calculation method of the static(al) of device, specifically includes:
Firstly, the maximum working pressure (MWP) for designing hydraulic system in the present embodiment is 20Mpa, to meet hydraulic system versatility
Requirement；
Secondly, specifically according to the maximum static design requirement of the accurate loading simulator of static(al) in this method, i.e., it is maximum quiet
Power is equal to the relationship of design maximum pressure and the effective internal diameter area of oil cylinder, and effective cylinder diameter: D is calculatedeffective, calculation formula
Such as formula:
Wherein: PmaxIndicate maximum pressure, unit: Pa；
FmaxIndicate maximum pressure, unit: N；
SeffectiveIndicate the effective internal diameter of oil cylinder, unit: m2；
DeffectiveIndicate the effective internal diameter of oil cylinder, unit: m.
Meanwhile specifically according to the assembling work height H of static loading simulated experiment in the present embodiment1With explosive material when load
The height H of material0Determine the stroke H of hydraulic cylinder2, calculation formula are as follows: H2=H1-H0；
Specifically, the calculation method in the present embodiment about hydraulic oil container volume are as follows: according to hydraulic cylinder volume VcyWith liquid
Medium oil volume V after pressure oil pipe fullpipe, it is not less than five points of total volume according to full of hydraulic station fuel tank volume after Medium Oil
Four principle, calculate hydraulic station fuel tank volume Vtank, calculation formula are as follows:
Vtank=5 (Vcy+Vpipe)
Wherein: VcyIndicate hydraulic cylinder volume, unit are as follows: m3；
VpipeIndicate in pipeline medium oil volume, unit are as follows: m under normal pressure3；
VtankIndicate hydraulic station fuel tank volume, unit are as follows: m3；
Hydraulic-driven pumping source design method is further related in this method, specifically:
According to the idle running rate request of uplink and downlink, the hydraulic medium oil output that pumping source is driven in lost motion is calculated
Flow νZeroLoad, the medium oil volume V of oil cylinder is filled it up with according to calculation methodVatFullWith the time used
Then, require the hydraulic medium for designing the dynamic middle driving pumping source of carrying oily according to the load rate of loading and unloading
Output flow νLoad, calculation method is to be carried out calculating according to liquid compression formula being loaded into peak load FMaxJie of required injection
Matter oil volume Δ VInject, the shortest time t according to needed for being loaded into peak loadLoadMaxMaximum Medium Oil injection is calculated
Speed
Preferably, working as ν in view of proportional flow control valve work dead zone cut-off characteristicsZeroLoad≥10·νLoadWhen, generally need
Idle running is respectively completed using the hydraulic pump of two different flows and has the hydraulic-driven function of load；
Specifically, load predominantly overcomes liquid inertia and rubs since idle running pump only completes uplink and downlink movement
Power is wiped, it is general to select outlet pressure in 2Mpa low-pressure hydraulic pump below, meanwhile, the load of the hydraulic system according to needed for loading force
Operating pressure, the maximum pressure of design load pump should be not less than 25MPa in this method.
Hydraulic-driven pump motor design method in this method specifically:
It is general to select threephase asynchronous machine driving, the power P o of motorMotorAccording to pump discharge pressure PPumpWith flow νPump
It calculates:
Proportional pressure control valve circuit design method in this method specifically: hydraulic proportional overflow is selected according to maximum working pressure (MWP)
Valve, and the lockable maximum pressure firmly of hydraulic proportional overflow valve should be greater than the maximum working pressure (MWP) of hydraulic system；
Proportional flow control valve circuit design method in this method specifically: wanted according to the linearity of accurate drive system with flow
It asks, the maximum stream flow of hydraulic proportional flow valve should be with flow matches needed for maximum load speed.
Specifically, the accurate loading simulation dress of the static(al) for being applied to the test of large-tonnage safe type material mechanical strength of the invention
The accurate driving system structure design method of the static(al) set, specifically includes:
Firstly, as shown in Figure 1, the accurate drive system of the static(al) designed in this method composition include: hydraulic oil container, it is hydraulic
It is valve control block, motor and hydraulic pump, hydraulic directio control valve, hydraulic circuit flow control valve, that is, hydraulic proportional flow valve, hydraulic
Oil circuit proportional pressure control valve, that is, hydraulic proportional overflow valve, hydraulic cylinder, hydraulic oil pipe, hydraulic oil meter, hydraulic cylinder pressure sensor,
Cylinder displacement sensor etc. illustrates only crucial components in Fig. 1, wherein hydraulic directio control valve in Fig. 1 by downlink with
Backhaul reversal valve is realized, specifically contains downlink reversing switch valve and backhaul reversing switch valve, and high-pressure pump and low-lift pump are for this
The hydraulic pump of system, and high-pressure pump is load pump, low-lift pump is idle running pump.
Wherein, hydraulic oil container provides medium oil sources for hydraulic system；Hydraulic electric motor provides with hydraulic pump for hydraulic system dynamic
Pressure medium oil pump is entered hydraulic valve control block by power；Various hydraulic valves (hydraulic directio control valve, hydraulic circuit flow control valve,
Hydraulic circuit proportional pressure control valve) with hydraulic valve control block realize that the direction of hydraulic oil, pressure, flow and pressure and other parameters control；
Hydraulic cylinder is used for the accurate drive system output machine power of static(al) and load；Hydraulic oil pipe realizes hydraulic station and hydraulic cylinder
Medium Oil piping connection；Hydraulic oil meter is used to indicate the output pressure of hydraulic pump；Hydrostatic sensor is for measuring hydraulic cylinder
Medium pressure；Proportional pressure control valve realizes the control of hydraulic cylinder pressure by control aperture；Proportional flow control valve passes through control flow
Realize the control of hydraulic cylinder pressure；Cylinder displacement sensor is used to measure the absolute displacement of oil cylinder formed punch.
Specifically, the connection installation relation of above-mentioned each component part are as follows: hydraulic oil container is the main body of hydraulic system, hydraulic valve
Control block, motor and hydraulic pump are mounted on hydraulic oil container；Hydraulic valve piece is mounted in hydraulic valve control block；Motor and hydraulic pump
Connection, hydraulic pump one end connects fuel tank, the other end connects hydraulic valve control block；Hydraulic oil meter is mounted on the outlet of hydraulic pump；Liquid
Pressure oil cylinder pressure transducer is mounted on the import of hydraulic cylinder；Cylinder displacement sensor is built in oil cylinder, kinematic link and oil
Cylinder formed punch is integrally mobile.
Meanwhile in the accurate drive system of static(al) designed in this method include two-way drive hydraulic motor circuit, respectively by
Motor and hydraulic pressure pump group are at responsible fast offset control function, is responsible for load control function all the way all the way；Two-way hydraulic-driven electricity
Machine circuit includes motor, hydraulic pump, hydraulic oil meter；Realize that hydraulic pump used in the electric motor loop of fast offset control function is
Low-lift pump realizes that hydraulic pump used in the electric motor loop of load control function is high-pressure pump；Specific requirement is low in the design method
The hydraulic output pressure of press pump is not higher than 1MPa, and the rate of discharge of low-lift pump requires to set according to the idle running velocity of displacement of oil cylinder formed punch
Meter, it may be assumed that
Flow=vlow·Seffective,
Wherein；vlowOil cylinder formed punch idle running speed when for low pressure pump operation, unit: m/s；
FlowLow pressure pump discharge when being run for oil cylinder formed punch idle running, unit: m3/s；
The highest hydraulic output pressure of high-pressure pump is not less than 20MPa, the rate of discharge of high-pressure pump according to oil cylinder formed punch load
Lotus controls rate request and the discharge characteristic of proportional flow control valve is combined to design, it may be assumed that
Fhigh=vhigh·Seffective,
Wherein；vhighOil cylinder formed punch idle running speed when for low pressure pump operation, unit: m/s；
FhighLow pressure pump discharge when being run for oil cylinder formed punch idle running, unit: m3/s；
Two hydraulic oil meters are respectively used to outlet pressure and the debugging for loading system, fault verification of monitoring hydraulic pump
With maintenance.
Specifically, above-mentioned hydraulic directio control valve is designed to include high-low pressure oil circuit selection switching valve, high-pressure oil passage
The functions such as on-off control valve, cylinder pipe on-off control valve, uplink and downlink oil passage change-over valve.
Above-mentioned hydraulic proportional flow valve (i.e. hydraulic circuit flow control valve) is designed to mainly realize load loading mode
Under the accurate control model of displacement, realize loading procedure in be displaced high-precision control；Wherein, the inlet and outlet of hydraulic proportional flow valve
Carrying oil pressure is designed as not less than 20MPa；The latus rectum characteristic of hydraulic proportional flow valve needs linear and low discharge dead zone；Hydraulic ratio
Example flow valve maximum diameter is designed according to Bit andits control maximum value in loading procedure.
Above-mentioned hydraulic proportional overflow valve (i.e. hydraulic circuit proportional pressure control valve) is designed to mainly realize load loading mode
Under the accurate control model of load, realize loading procedure in load high-precision control；Wherein, the disengaging of hydraulic proportional overflow valve valve
Mouthpiece carries oil pressure and is designed as not less than 20MPa；The turbulent behavior of hydraulic proportional overflow valve needs dull and low pressure dead zone；Hydraulic ratio
Example overflow valve maximum oil pressure relief is designed according to not less than 20MPa.
Specifically, the accurate loading simulation dress of the static(al) for being applied to the test of large-tonnage safe type material mechanical strength of the invention
The accurate drive system hydraulic control function design method of the static(al) set, specifically includes:
Firstly, hydraulic control function at least should include: hydraulic punching head downlink, uplink, loading and unloading, static pressure maintaining, mend
The functions such as pressure；Hydraulic valve control block, motor, hydraulic pump, hydraulic oil meter, hydraulic directio control valve, hydraulic proportional flow control valve
The control in hydraulic Medium Oil direction, Medium Oil pressure, medium oil stream amount has been collectively constituted with hydraulic proportional overflow valve.
The implementation method of the downlink working designed in this method are as follows: low pressure pump startup, low pressure pump-protecting valve, backhaul commutation are opened
It closes valve, downing switch valve, backhaul switch valve to close, remaining valve member is opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are not
Control is participated in, realizes and high-volume hydraulic oil is injected into oil cylinder top, oil cylinder downlink drives output mechanism downlink；
The implementation method of uplink work are as follows: low pressure pump startup, low pressure pump-protecting valve, downlink reversing switch valve, downing switch
Valve, backhaul switch valve are closed, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are not involved in control, are realized
High-volume hydraulic oil is injected into oil cylinder lower part, oil cylinder uplink drives output mechanism uplink, realizes backhaul function；
Load the implementation method of work are as follows: high pressure pump startup, unload compress switch, loaded switches and backhaul switching function it is hydraulic
Directional control valve is closed, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are according to high-precision wire linearity curve
Load control algolithm calculates proportional flow control valve aperture and proportional overflow valve opening in real time, realizes that controllable, on-load pressure can by flow
The small flow hydraulic oil controlled injects oil cylinder top, and oil cylinder hydraulic power rises, and realizes that driving output mechanism pressurizes to device is loaded；
The implementation method of unloaded operation are as follows: high-pressure pump, low-lift pump stop, and the hydraulic directional control valve of loaded switches function closes
It closes, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are according to high-precision wire linearity curve Unloading Control algorithm
Proportional flow control valve aperture and proportional overflow valve opening are calculated, realizes small flow hydraulic oil flow is controllable, that on-load pressure is controllable
It is discharged from oil cylinder top, the decline of oil cylinder hydraulic power realizes driving output mechanism to the discharge for being loaded device application；
Static state protects the implementation method for carrying (i.e. static pressure maintaining) work are as follows: high-pressure pump, low-lift pump stop, release switching function
Hydraulic directio control valve is closed, other valve members open, hydraulic proportional flow valve and hydraulic proportional overflow valve maintain load or
Proportional flow valve opening and the proportional overflow valve opening for unloading finish time are constant, maintain the hyperbaric environment inside oil cylinder, realize
Driving output mechanism is protected the load for being loaded device application and is carried；
The implementation method of ftercompction work are as follows: high pressure pump startup, unload compress switch, loaded switches and the hydraulic side of backhaul switching function
It is closed to control valve, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are according to control flexible linear ftercompction
Algorithm calculates proportional flow control valve aperture and proportional overflow valve opening, realizes small flow liquid flow is controllable, that on-load pressure is controllable
Pressure oil injects oil cylinder top, and oil cylinder hydraulic power rises to goal pressure, realizes driving output mechanism to being loaded device ftercompction.
Specifically, the accurate loading simulation dress of the static(al) for being applied to the test of large-tonnage safe type material mechanical strength of the invention
The load set loses the method for controlling security under carrying suddenly, specifically includes load and loses the Security Design Methods under carrying suddenly and control behaviour
Make process:
Load loses the Security Design Methods under carrying suddenly are as follows: after load loses load, hydraulic system need to have self-closing lock function, liquid
Pressure lock can be latched hydraulic circuit, and high-pressure medium oil is latched and is ended；Control operating process includes: the height for cutting off loading oil circuit at once
Hydraulic coupling is discharged into level of security according to hydraulic coupling pressure relief method, according to setting speed by press pump motor
Mould is accurately loaded from the foregoing, it will be observed that providing one kind according to the technical solution of the present invention and being applied to material static strength static(al)
The load driver design method of quasi- device meets static(al) precision load test and controls high-precision, flexibility, safety to pressure
The demand of control type, this method can promote the use of other static force loading device developments.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (10)
1. the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage, which is characterized in that including application
In the realization of the accurate drive system of static(al) of the accurate loading simulator of static(al) of large-tonnage safe type material mechanical strength test
The accurate Driving Scheme calculation method of method, static(al), the accurate driving system structure design method of static(al), static(al) accurately drive and are
System hydraulic control function design method, load lose the method for controlling security under carrying suddenly.
2. the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage according to claim 1,
It is characterized in that, the implementation method of the accurate drive system of static(al) is realized using hydraulic-driven method, by designing hydraulic drive
Autocontrol system speed precision control driving static(al) generate, by hydraulic cylinder realize driving static(al) linear convergent rate to be modeled add
Carry component；
Wherein, fluid power system uses automatically controlled servo valve drive control type hydraulic system, and hydraulic pump is driven by motor and provides liquid
Pressure oil source, by the side of hydraulic directio control valve, hydraulic proportional flow valve control hydraulic medium oil corresponding with hydraulic proportional overflow valve
To, flow and pressure, meanwhile, direction, flow and the controllable hydraulic energy of pressure are turned using accurate cylinder-shaped hydraulic cylinder
Turn to linear driving mechanical energy output.
3. the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage according to claim 2,
It is characterized in that, the accurate Driving Scheme calculation method of static(al) specifically includes:
The maximum working pressure (MWP) of hydraulic system is designed as 20Mpa, is set according to the maximum static(al) of the accurate loading simulator of static(al)
Meter requires, i.e., maximum static(al) is equal to the relationship of design maximum pressure and the effective internal diameter area of oil cylinder, and effective cylinder diameter is calculated
Deffective, calculation formula are as follows:
Wherein: PmaxIndicate maximum pressure, unit: Pa；FmaxIndicate maximum pressure, unit: N；SeffectiveIn indicating oil cylinder effectively
Diameter, unit: m2；DeffectiveIndicate the effective internal diameter of oil cylinder, unit: m；
According to the assembling work height H of static loading simulated experiment1With the height H of explosive material when load0Determine hydraulic cylinder
Stroke H2, calculation formula are as follows: H2=H1-H0；
According to hydraulic cylinder volume VcyWith medium oil volume V after hydraulic oil pipe fullpipe, according to full of hydraulic station after Medium Oil
Fuel tank volume is not less than 4/5ths principle of total volume, calculates hydraulic station fuel tank volume Vtank, calculation formula are as follows: Vtank
=5 (Vcy+Vpipe)；
Wherein: VcyIndicate hydraulic cylinder volume, unit are as follows: m3；VpipeIndicate in pipeline medium oil volume, unit under normal pressure are as follows:
m3；VtankIndicate hydraulic station fuel tank volume, unit are as follows: m3。
4. the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage according to claim 3,
It is characterized in that, further including hydraulic-driven pumping source design method in the accurate Driving Scheme calculation method of static(al), hydraulic
Drive pump motor design method, proportional pressure control valve circuit design method, proportional flow control valve circuit design method；
Wherein, hydraulic-driven pumping source design method specifically:
According to the idle running rate request of uplink and downlink, the hydraulic medium oil output flow that pumping source is driven in lost motion is calculated
νZeroLoad, the medium oil volume V of oil cylinder is filled it up with according to calculation methodVatFullWith time t usedFull:
It requires to design the dynamic middle hydraulic medium oil output flow for driving pumping source of carrying according to the load rate of loading and unloading
νLoad, calculation method is to be carried out calculating according to liquid compression formula being loaded into peak load FMaxThe medium oil volume of required injection
ΔVInject, the shortest time t according to needed for being loaded into peak loadLoadMaxMaximum Medium Oil injection rate ν is calculatedLoad:
Hydraulic-driven pump motor design method specifically: select threephase asynchronous machine driving, the power P o of motorMotorAccording to pumping out
Mouth pressure PPumpWith flow νPumpIt calculates:
Proportional pressure control valve circuit design method specifically: hydraulic proportional overflow valve, and hydraulic ratio are selected according to maximum working pressure (MWP)
The lockable maximum pressure firmly of example overflow valve should be greater than the maximum working pressure (MWP) of hydraulic system；
Proportional flow control valve circuit design method specifically: according to the linearity and traffic requirement of accurate drive system, hydraulic proportional
The maximum stream flow of flow valve should be with flow matches needed for maximum load speed.
5. the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage according to claim 4,
It is characterized in that, working as ν in hydraulic-driven pumping source design methodZeroLoad≥10·νLoadWhen, using the liquid of two different flows
Press pump is respectively completed idle running and has the hydraulic-driven function of load, selects outlet pressure in 2Mpa low-pressure hydraulic pump below and basis
Hydraulic system needed for loading force loads operating pressure.
6. the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage according to claim 4,
It is characterized in that, the accurate driving system structure design method of static(al), specifically includes:
The accurate drive system of static(al) includes: hydraulic oil container, hydraulic valve control block, motor and hydraulic pump, hydraulic side in composition
To control valve, hydraulic proportional flow valve, hydraulic proportional overflow valve, hydraulic cylinder, hydraulic oil pipe, hydraulic oil meter, hydraulic cylinder pressure
Force snesor, cylinder displacement sensor；
The hydraulic oil container is the main body of hydraulic system, and hydraulic valve control block, motor and hydraulic pump are mounted on hydraulic oil container；Liquid
Pressure directional control valve, hydraulic proportional flow valve, hydraulic proportional overflow valve are mounted in hydraulic valve control block；Motor and hydraulic pump connect
It connects, hydraulic pump one end connects hydraulic oil container, the other end connects hydraulic valve control block；Hydraulic oil meter is mounted on the outlet of hydraulic pump；
Hydraulic cylinder pressure sensor is mounted on the import of hydraulic cylinder；Cylinder displacement sensor is built in oil cylinder, kinematic link with
Oil cylinder formed punch is integrally mobile；
The accurate drive system of static(al) includes two-way drive hydraulic motor circuit, controls function all the way for realizing fast offset
Can, all the way for realizing load control function, two-way drive hydraulic motor circuit includes motor, hydraulic pump, hydraulic oil meter, reality
Hydraulic pump used in the electric motor loop of existing fast offset control function is low-lift pump, realizes the electric motor loop institute of load control function
Hydraulic pump is high-pressure pump.
7. the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage according to claim 6,
It is characterized in that, the hydraulic output pressure of the low-lift pump is not higher than 1MPa, the rate of discharge of low-lift pump is according to oil cylinder formed punch
Idle running velocity of displacement requires design, it may be assumed that Flow=vlow·Seffective,
Wherein；vlowOil cylinder formed punch idle running speed when for low pressure pump operation, unit: m/s；FlowIt is low when being run for oil cylinder formed punch idle running
Press pump flow, unit: m3/s；
The highest hydraulic output pressure of high-pressure pump is not less than 20MPa, the rate of discharge of high-pressure pump according to oil cylinder formed punch load control
Rate request processed simultaneously combines the discharge characteristic of proportional flow control valve to design, it may be assumed that Fhigh=vhigh·Seffective,
Wherein；vhighOil cylinder formed punch idle running speed when for low pressure pump operation, unit: m/s；
FhighLow pressure pump discharge when being run for oil cylinder formed punch idle running, unit: m3/s。
8. the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage according to claim 6,
It is characterized in that, the hydraulic directio control valve of the accurate drive system of static(al) is designed to include at least the choosing of high-low pressure oil circuit
Select switching valve, high-pressure oil passage on-off control valve, cylinder pipe on-off control valve, uplink and downlink oil passage change-over valve；
The hydraulic proportional flow valve is designed to realize the accurate control model of displacement under load loading mode, and realization loaded
High-precision control is displaced in journey, wherein the inlet and outlet carrying oil pressure of hydraulic proportional flow valve is designed as leading to not less than 20Mpa
Diameter characteristic needs linear and low discharge dead zone, maximum diameter to be designed according to Bit andits control maximum value in loading procedure；
The hydraulic proportional overflow valve is designed to realize the accurate control model of load under load loading mode, and realization loaded
Load high-precision control in journey；The inlet and outlet carrying oil pressure of hydraulic proportional overflow valve is designed as not less than 20Mpa, turbulent behavior
Dull and low pressure dead zone is needed, maximum oil pressure relief is designed according to not less than 20MPa.
9. the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage according to claim 8,
It is characterized in that, the accurate drive system hydraulic control function design method of static(al) includes:
The accurate drive system hydraulic control function of static(al) at least should include: hydraulic punching head downlink working, uplink work, load
Work and unloaded operation, the static function of protecting load work and ftercompction work；
The implementation method of the uplink work are as follows: low pressure pump startup, low pressure pump-protecting valve, downlink reversing switch valve, downing switch
Valve, backhaul switch valve are closed, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are not involved in control, are realized
High-volume hydraulic oil is injected into oil cylinder lower part, oil cylinder uplink drives output mechanism uplink, realizes backhaul function；
The implementation method of the load work are as follows: high pressure pump startup, unload compress switch, loaded switches and backhaul switching function it is hydraulic
Directional control valve is closed, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are according to high-precision wire linearity curve
Load control algolithm calculates proportional flow control valve aperture and proportional overflow valve opening in real time, realizes that controllable, on-load pressure can by flow
The small flow hydraulic oil controlled injects oil cylinder top, and oil cylinder hydraulic power rises, and realizes that driving output mechanism pressurizes to device is loaded；
The implementation method of the unloaded operation are as follows: high-pressure pump, low-lift pump stop, and the hydraulic directional control valve of loaded switches function closes
It closes, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are according to high-precision wire linearity curve Unloading Control algorithm
Proportional flow control valve aperture and proportional overflow valve opening are calculated, realizes small flow hydraulic oil flow is controllable, that on-load pressure is controllable
It is discharged from oil cylinder top, the decline of oil cylinder hydraulic power realizes driving output mechanism to the discharge for being loaded device application；
The static implementation method for protecting load work are as follows: high-pressure pump, low-lift pump stop, the control of release switching function hydraulic directio
Valve is closed, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve maintain load or unloading finish time
Proportional flow valve opening and proportional overflow valve opening it is constant, maintain oil cylinder inside hyperbaric environment, realize driving output mechanism
The load for being loaded device application is protected and is carried；
The implementation method of ftercompction work are as follows: high pressure pump startup, unload compress switch, loaded switches and the hydraulic side of backhaul switching function
It is closed to control valve, other valve members are opened, and hydraulic proportional flow valve and hydraulic proportional overflow valve are according to control flexible linear ftercompction
Algorithm calculates proportional flow control valve aperture and proportional overflow valve opening, realizes small flow liquid flow is controllable, that on-load pressure is controllable
Pressure oil injects oil cylinder top, and oil cylinder hydraulic power rises to goal pressure, realizes driving output mechanism to being loaded device ftercompction.
10. the accurate driving method of static(al) of the accurate loading simulator of the safety-type static(al) of large-tonnage according to claim 9,
It is characterized in that, the load is lost suddenly carries lower method of controlling security, specifically includes load and lose safe design under load suddenly
Method and control operating process:
The load loses the Security Design Methods under carrying suddenly are as follows: after design load loses load, hydraulic system need to have Self-closing lock function
Can, hydraulic lock can be latched hydraulic circuit, and high-pressure medium oil is latched and is ended；
Control operating process includes: the high pressure pump motor for cutting off loading oil circuit at once, according to hydraulic coupling pressure relief method, according to setting
Hydraulic coupling is discharged into level of security by speed.
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